I have a Changhong TV/DVD combo (150 series). I found the right code to get the One for All URC 7711 to work with this tv/dvd combo. However, I can't work out how to select DVD mode. If I use the AV button, the Input Source menu comes up and I can only scroll through that list using the AV button again as no arrows work, and then the ok button doesn't work so I can't select DVD or any other Input Source.

Any help would be appreciated as my little boy is missing his Thomas the Tank & Wiggles dvds :)